TITLE: GCN CIRCULAR NUMBER: 5912 SUBJECT: GRB 061210: Gemini/GMOS Observations DATE: 06/12/13 02:49:20 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko (Caltech), D. B. Fox (Penn State), and P. A. Price (IfA/Hawaii) report on behalf of a larger collaboration: We observed the field of the short-hard GRB061210 (Cannizzo et al., GCN 5904) with the Gemini Multi-Object Spectrograph in imaging mode mounted on the Gemini North telescope. Our first set of observations was taken in r' at a mean epoch of 14:27 Dec. 10 UT (2.1 hours after the burst) and covers ~ 90% of the refined BAT error circle (Palmer et al., GCN 5905). Contamination from the nearby moon significantly affected the sensitivity of these images. A second r' reference epoch was taken the following evening, at a mean epoch of 13:54 Dec. 11 UT (25.6 hours after the burst). Digital image subtraction using the ISIS software package (Alard & Lupton 1998, ApJ, v. 503, p. 325) revealed no variable object anywhere in the field. We place a limit of r' > 23.5 mag for any isolated point-source afterglow emission at the time of the first epoch.